74438 has 16 divisors (see below), whose sum is σ = 137760. Its totient is φ = 29376.

The previous prime is 74419. The next prime is 74441. The reversal of 74438 is 83447.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

74438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23 + ... + 386.

It is an arithmetic number, because the mean of its divisors is an integer number (8610).

2⁷⁴⁴³⁸ is an apocalyptic number.

74438 is a deficient number, since it is larger than the sum of its proper divisors (63322).

74438 is a wasteful number, since it uses less digits than its factorization.

74438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431.

The product of its digits is 2688, while the sum is 26.

The square root of 74438 is about 272.8332824272. The cubic root of 74438 is about 42.0660336915.

Subtracting 74438 from its reverse (83447), we obtain a palindrome (9009).

It can be divided in two parts, 74 and 438, that added together give a 9-th power (512 = 2⁹).

The spelling of 74438 in words is "seventy-four thousand, four hundred thirty-eight".